JPH037940Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an electronic component, such as a magnetic capacitor, a CR composite component, or a resistor, which is equipped with a substrate formed in the shape of a flat block and has electrodes formed on the opposing main surfaces of the substrate. .

Conventionally, there are various types of electronic components such as ceramic capacitors, but as shown in FIG.
A disc-shaped one in which a and 1a are circular [Figure 1 (a)],
Or a square plate-like one in which both main surfaces 1a, 1a are formed in a square or rectangular shape [Fig. 1 (b)] 2
The street stuff is known.

By the way, in order to provide electrodes on both main surfaces 1a, 1a of the substrate 1 having such a shape, an automatic printing machine 6 as shown in FIG. 2 is generally widely used. There is.
In the same figure, this automatic printing machine 6 is equipped with a disk-shaped base 8, and a depression 7b for setting having the same shape as the substrate 1 (a circular depression in the figure) is formed on the surface of the base 8. ) are drilled in the required number at regular intervals in the circumferential direction, and
Means 9 for applying an electrode material to one main surface 1a of the substrate 1 is provided so as to face above the setting depression 7b, and when applying an electrode to the substrate 1, a substrate is applied to each setting depression 7b. 1 is fitted into each substrate 1, the base 8 is intermittently rotated and the electrode material applying means 9 is driven to sequentially apply a paste-like electrode material to one main surface 1a of each substrate 1 by printing or the like. It's summery.

However, in this case, the shape of the setting recess 7b of the autoprinting machine 6 is made to follow approximately the outer shape of the substrate 1, so that at least the substrate 1 fitted into the recess 7b does not shift or move within the recess 7b. Therefore, in the manufacturing process, for example, if it is desired to apply electrodes to a square plate-shaped substrate 1 after completing the electrode application process to a disk-shaped substrate 1, the shape of the setting recess 7b should be adapted to that. Either the base 8 must be replaced, or another automatic printing machine 6 suitable for the substrate 1 must be prepared. Therefore, in the former case, it takes time and effort to prepare for replacing the base 8, and in the latter case, there is a problem that the equipment requires too much expense.

Therefore, it is conceivable to change the shape of the setting recess 7b of the autoprinting machine 6 to be adapted to both the disk-shaped substrate and the square plate-shaped substrates 1, 1, but it is possible to shift both substrates 1, 1. In order to maintain this condition without any problems, it is practically impossible to simply change the design of the shape of the recess 7b.

The present invention was made in view of this problem, and instead of changing the design of the setting recess on the autoprinting machine side, by devising the shape of the board of the electronic component body, it is possible to change the generally widely adopted circular shape. The object of the present invention is to ensure that the device is correctly set without any displacement using both the rectangular setting recess and the rectangular setting recess, thereby streamlining production by using conventional manufacturing equipment as is. Therefore, in the present invention, in order to achieve this objective, the main surface shape of the substrate formed in the shape of a flat block is basically a square, and the shape of the main surface of the substrate is defined by an arc centered on the centroid of the square. It was assumed that the corner was cut out.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. In this embodiment, a case where the present invention is applied to a ceramic capacitor having a discharge electrode as an electronic component will be explained.

FIG. 3 is a plan view of this capacitor C, and FIG. 4 is its equivalent circuit diagram. In each figure, this capacitor C is provided with a dielectric substrate 1 made of ceramic or the like formed in the shape of a flat block. This dielectric substrate 1 has a pair of first and second capacitor electrodes 2, 2 formed by printing an electrode material printed on one main surface 1a, and a third capacitor electrode 2 on the other main surface 1a. 3 is formed at a position facing the first and second capacitor electrodes 2, 2 with the dielectric substrate 1 interposed therebetween, whereby two first and second capacitors C1 connected in series with each other are formed. ,C2
I am getting . the first and second capacitor electrodes 2,
2 has a pair of discharge electrodes 4, 4 at its lower end, and has lead terminals 5, 5 drawn out from its upper surface. Both discharge electrodes 4, 4 are arranged to face each other to form a discharge gap g, and when a high voltage is applied between both lead terminals 5, 5, discharge occurs between both discharge electrodes 5, 5, It is adapted to discharge the high voltage input well.

Incidentally, after the lead terminals 5, 5 are soldered onto the first and second capacitor electrodes 2, 2, the capacitor C is entirely coated with an exterior material made of synthetic resin or the like, and then manufactured as a product.

Now, each of the electrodes 2, 3, and 5 is printed on the main surface 1a of the dielectric substrate 1 by an automatic printing machine 6 as shown in FIG. Granted. In the present invention, the shape of the main surface 1a of the dielectric substrate 1 is basically a square, and the four corners of the square are cut out by circular arcs centered on the centroid of the square. It is characterized by what it did.

FIG. 5 is a perspective view of the dielectric substrate 1, and FIG. 6 is a plan view thereof. In each figure, the recess for setting the auto printing machine 6 is 1 in Figure 6.
A square shape 7a shown by a chain dotted line and a circular shape 7b shown by a two-dot chain line are conventionally used forms. Dielectric substrate 1
The shape of the main surface 1a is made into a superimposed square and circular shape so that any of them can be fitted. That is, the front and rear, left and right linear sides 1b are formed to match the inner wall surfaces of the square recess 7a, and the arcuate sides 1c at the four diagonally opposing corners are formed to match the inner wall surfaces of the circular recess 7b. ing. Therefore, main surface 1 of this dielectric substrate 1
Dimension a between the straight sides 1b and 1b of the square part of a
is approximately the same as the dimension between the opposing inner wall surfaces of the square recess 7a, and the dimension b between the four arcuate sides 1c, 1c is approximately equal to the diameter dimension of the circular recess 7b.

Now, this dielectric substrate 1 is placed in an autoprinting machine (not shown) having a square recess 7a.
When inserted, the front, rear, left and right linear sides 1b of the dielectric substrate 1 are inscribed in the inner wall surface of the square recess 7a, and displacement and rotation within the recess 7a are restricted. This is suitable for electrode shapes in which the directionality of electrode application is determined. Furthermore, regarding electrode shapes that do not necessarily have directionality, if this dielectric substrate 1 is fitted into an autoprinting machine 6 (see FIG. 2) having a circular depression 7b, the dielectric substrate 1 within the depression 7b can be Although the rotation of the dielectric substrate 1 is not restricted, the arcuate side 1c of the dielectric substrate 1 is inscribed in the inner wall surface of the circular recess 7b, and its displacement is restricted.

In addition, the dimensions and shapes of the two types of setting recesses 7a and 7b will be different depending on the dimensions and shapes of electronic components such as capacitors to which electrodes are applied. The dimensional ratio of each of the linear side 1b and the arcuate side 1c of the component can be changed as appropriate depending on the size and shape of the various setting depressions 7a, 7b.

As described above, according to the present invention, the main surface shape of the substrate formed in the shape of a flat block is basically a square, and the four corners of the square are cut by circular arcs centered on the centroid. Because it has a compact shape,
The setting recess of an auto printing machine, which is generally widely used in both the circular and square shapes, not only allows for correct setting without any movement, but also allows for the printing process of electrodes and resistors, and leads. The work equipment is easy to handle on production lines such as wire soldering processes, and setups can be simplified. Therefore, it has become possible to rationalize production by using conventional manufacturing equipment as is.

In addition, in the case of square electronic components, the outer dimensions have to be increased due to the exterior coating, but in the case of the electronic component in this case, the four corners are cut out, so the outer dimensions can be reduced. This has the advantage of being able to achieve as much as possible.

[Brief explanation of the drawing]

FIGS. 1A and 1B are plan views showing conventional electronic component substrates, respectively, and FIG. 2 is a schematic plan view of essential parts showing an example of an autoprinting machine. Figures 3 to 6 show embodiments of the present invention;
4 is a plan view, FIG. 4 is an equivalent circuit diagram, FIG. 5 is a perspective view of the dielectric substrate, and FIG. 6 is a plan view of the dielectric substrate. 1 is the substrate, 1a is the main surface, 1b is the linear side, 1
c is an arcuate side, and 2, 3, and 4 are electrodes.

Claims (1)

[Claims for Utility Model Registration] An electronic component comprising a substrate formed in the shape of a flat block, with electrodes formed on both main surfaces of the substrate, wherein the main surface shape of the substrate is basically square;
An electronic component characterized in that the electronic component has a shape in which the four corners of the square are cut out by circular arcs centered on the centroid of the electronic component.